<!DOCTYPE html>
<html lang=zh>
<head>
  <meta charset="utf-8">
  
  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
  <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no, minimal-ui">
  <meta name="renderer" content="webkit">
  <meta http-equiv="Cache-Control" content="no-transform" />
  <meta http-equiv="Cache-Control" content="no-siteapp" />
  <meta name="apple-mobile-web-app-capable" content="yes">
  <meta name="apple-mobile-web-app-status-bar-style" content="black">
  <meta name="format-detection" content="telephone=no,email=no,adress=no">
  <!-- Color theme for statusbar -->
  <meta name="theme-color" content="#000000" />
  <!-- 强制页面在当前窗口以独立页面显示,防止别人在框架里调用页面 -->
  <meta http-equiv="window-target" content="_top" />
  
  <meta name="google-site-verification" content="XKEVBvaS3n3qpVoP-hQqQ2XJ9t43pt4B7J1sLZgRJG4" />
  
  
  <title>实用工具 | PostgreSQL 数据库压力测试工具 pgbench 使用示例 | DBKernel - 专注于分享数据库技术</title>
  <meta name="description" content="本文首发于 2015-12-23 21:04:17  环境PG数据库提供了一款轻量级的压力测试工具叫 pgbench，其实就是一个编译好后的扩展性的可执行文件。 测试环境：  CentOS 5.7 in VMWare 8.0 PG：9.1.2  数据库参数：  max_connection&#x3D;100 其他默认 注意： 本文只为说明 pgbench 的使用方法，因此，并未对数据库参数调优。  安">
<meta property="og:type" content="article">
<meta property="og:title" content="实用工具 | PostgreSQL 数据库压力测试工具 pgbench 使用示例">
<meta property="og:url" content="http://dbkernel.github.io/2015/12/23/example-of-postgresql-pgbench/index.html">
<meta property="og:site_name" content="DBKernel">
<meta property="og:description" content="本文首发于 2015-12-23 21:04:17  环境PG数据库提供了一款轻量级的压力测试工具叫 pgbench，其实就是一个编译好后的扩展性的可执行文件。 测试环境：  CentOS 5.7 in VMWare 8.0 PG：9.1.2  数据库参数：  max_connection&#x3D;100 其他默认 注意： 本文只为说明 pgbench 的使用方法，因此，并未对数据库参数调优。  安">
<meta property="og:locale" content="zh_CN">
<meta property="og:image" content="https://dbkernel-1306518848.cos.ap-beijing.myqcloud.com/wechat/my-wechat-official-account.png">
<meta property="article:published_time" content="2015-12-23T13:04:17.000Z">
<meta property="article:modified_time" content="2021-09-24T13:52:42.949Z">
<meta property="article:author" content="DBKernel">
<meta property="article:tag" content="PostgreSQL">
<meta property="article:tag" content="pgbench">
<meta name="twitter:card" content="summary">
<meta name="twitter:image" content="https://dbkernel-1306518848.cos.ap-beijing.myqcloud.com/wechat/my-wechat-official-account.png">
  <!-- Canonical links -->
  <link rel="canonical" href="http://dbkernel.github.io/2015/12/23/example-of-postgresql-pgbench/index.html">
  
    <link rel="alternate" href="/atom.xml" title="DBKernel" type="application/atom+xml">
  
  
    <link rel="icon" href="/favicon.png" type="image/x-icon">
  
  
<link rel="stylesheet" href="../../../../css/style.css">

  
  
  
  
    <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/gitalk@1.4.0/dist/gitalk.min.css">
  
<meta name="generator" content="Hexo 5.4.0"></head>


<body class="main-center" itemscope itemtype="http://schema.org/WebPage">
  <header class="header" itemscope itemtype="http://schema.org/WPHeader">
  <div class="slimContent">
    <div class="navbar-header">
      
      
      <div class="profile-block text-center">
        <a id="avatar" href="https://github.com/dbkernel" target="_blank">
          <img class="img-circle img-rotate" src="../../../../images/avatar.png" width="200" height="200">
        </a>
        <h2 id="name" class="hidden-xs hidden-sm">DBKernel</h2>
        <h3 id="title" class="hidden-xs hidden-sm hidden-md">资深数据库开发工程师</h3>
        <small id="location" class="text-muted hidden-xs hidden-sm"><i class="icon icon-map-marker"></i> Beijing, China</small>
      </div>
      
      <div class="search" id="search-form-wrap">

    <form class="search-form sidebar-form">
        <div class="input-group">
            <input type="text" class="search-form-input form-control" placeholder="搜索" />
            <span class="input-group-btn">
                <button type="submit" class="search-form-submit btn btn-flat" onclick="return false;"><i class="icon icon-search"></i></button>
            </span>
        </div>
    </form>
    <div class="ins-search">
  <div class="ins-search-mask"></div>
  <div class="ins-search-container">
    <div class="ins-input-wrapper">
      <input type="text" class="ins-search-input" placeholder="想要查找什么..." x-webkit-speech />
      <button type="button" class="close ins-close ins-selectable" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
    </div>
    <div class="ins-section-wrapper">
      <div class="ins-section-container"></div>
    </div>
  </div>
</div>


</div>
      <button class="navbar-toggle collapsed" type="button" data-toggle="collapse" data-target="#main-navbar" aria-controls="main-navbar" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
    </div>
    <nav id="main-navbar" class="collapse navbar-collapse" itemscope itemtype="http://schema.org/SiteNavigationElement" role="navigation">
      <ul class="nav navbar-nav main-nav ">
        
        
        <li class="menu-item menu-item-home">
          <a href="../../../../.">
            
            <i class="icon icon-home-fill"></i>
            
            <span class="menu-title">首页</span>
          </a>
        </li>
        
        
        <li class="menu-item menu-item-archives">
          <a href="../../../../archives">
            
            <i class="icon icon-archives-fill"></i>
            
            <span class="menu-title">归档</span>
          </a>
        </li>
        
        
        <li class="menu-item menu-item-categories">
          <a href="../../../../categories">
            
            <i class="icon icon-folder"></i>
            
            <span class="menu-title">分类</span>
          </a>
        </li>
        
        
        <li class="menu-item menu-item-tags">
          <a href="../../../../tags">
            
            <i class="icon icon-tags"></i>
            
            <span class="menu-title">标签</span>
          </a>
        </li>
        
        
        <li class="menu-item menu-item-repository">
          <a href="../../../../repository">
            
            <i class="icon icon-project"></i>
            
            <span class="menu-title">项目</span>
          </a>
        </li>
        
        
        <li class="menu-item menu-item-links">
          <a href="../../../../links">
            
            <i class="icon icon-friendship"></i>
            
            <span class="menu-title">友链</span>
          </a>
        </li>
        
        
        <li class="menu-item menu-item-about">
          <a href="../../../../about">
            
            <i class="icon icon-cup-fill"></i>
            
            <span class="menu-title">关于</span>
          </a>
        </li>
        
      </ul>
      
	
    <ul class="social-links">
    	
        <li><a href="../../../../https:/github.com/dbkernel" target="_blank" title="Github" data-toggle=tooltip data-placement=top><i class="icon icon-github"></i></a></li>
        
        <li><a href="../../../../atom.xml" target="_blank" title="Rss" data-toggle=tooltip data-placement=top><i class="icon icon-rss"></i></a></li>
        
    </ul>

    </nav>
  </div>
</header>

  
    <aside class="sidebar" itemscope itemtype="http://schema.org/WPSideBar">
  <div class="slimContent">
    
      <div class="widget">
    <h3 class="widget-title">公告</h3>
    <div class="widget-body">
        <div id="board">
            <div class="content">
                <p>本站专注于分享关系型数据库及分布式数据库相关技术！如需深入交流，可添加我的微信或关注我的公众号数据库内核：</br><img src="/images/wechat-me.jpeg" width="130" height="130"/> <img src="/images/wechat-gzh.jpeg" width="130" height="130"/></p>
            </div>
        </div>
    </div>
</div>

    
      
  <div class="widget">
    <h3 class="widget-title">分类</h3>
    <div class="widget-body">
      <ul class="category-list"><li class="category-list-item"><a class="category-list-link" href="../../../../categories/ClickHouse/">ClickHouse</a><span class="category-list-count">14</span></li><li class="category-list-item"><a class="category-list-link" href="../../../../categories/C%E8%AF%AD%E8%A8%80/">C语言</a><span class="category-list-count">8</span></li><li class="category-list-item"><a class="category-list-link" href="../../../../categories/GreenPlum/">GreenPlum</a><span class="category-list-count">3</span></li><li class="category-list-item"><a class="category-list-link" href="../../../../categories/Linux/">Linux</a><span class="category-list-count">5</span></li><li class="category-list-item"><a class="category-list-link" href="../../../../categories/MySQL/">MySQL</a><span class="category-list-count">4</span></li><li class="category-list-item"><a class="category-list-link" href="../../../../categories/PostgreSQL/">PostgreSQL</a><span class="category-list-count">7</span></li><li class="category-list-item"><a class="category-list-link" href="../../../../categories/Postgres-X2/">Postgres-X2</a><span class="category-list-count">1</span></li><li class="category-list-item"><a class="category-list-link" href="../../../../categories/%E7%BC%96%E8%AF%91%E8%B0%83%E8%AF%95/">编译调试</a><span class="category-list-count">1</span></li><li class="category-list-item"><a class="category-list-link" href="../../../../categories/%E9%80%9A%E7%94%A8/">通用</a><span class="category-list-count">1</span></li></ul>
    </div>
  </div>


    
      
  <div class="widget">
    <h3 class="widget-title">标签</h3>
    <div class="widget-body">
      <ul class="tag-list" itemprop="keywords"><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/APUE/" rel="tag">APUE</a><span class="tag-list-count">4</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/B-Tree/" rel="tag">B-Tree</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/ClickHouse/" rel="tag">ClickHouse</a><span class="tag-list-count">14</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/ClickHouse%E5%92%8C%E4%BB%96%E7%9A%84%E6%9C%8B%E5%8F%8B%E4%BB%AC/" rel="tag">ClickHouse和他的朋友们</a><span class="tag-list-count">14</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/Count/" rel="tag">Count</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/C%E8%AF%AD%E8%A8%80/" rel="tag">C语言</a><span class="tag-list-count">10</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/DAG-Scheduler/" rel="tag">DAG Scheduler</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/GreenPlum/" rel="tag">GreenPlum</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/HEAP%E5%BC%95%E6%93%8E/" rel="tag">HEAP引擎</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/LICENCE/" rel="tag">LICENCE</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/LSM-Tree/" rel="tag">LSM-Tree</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/Linux/" rel="tag">Linux</a><span class="tag-list-count">7</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/MEMORY%E5%BC%95%E6%93%8E/" rel="tag">MEMORY引擎</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/Makefile/" rel="tag">Makefile</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/Materialized-View/" rel="tag">Materialized View</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/MergeTree/" rel="tag">MergeTree</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/MySQL/" rel="tag">MySQL</a><span class="tag-list-count">8</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/Parser/" rel="tag">Parser</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/Percona/" rel="tag">Percona</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/PostgreSQL/" rel="tag">PostgreSQL</a><span class="tag-list-count">11</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/Postgres-X2/" rel="tag">Postgres-X2</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/Postgres-XC/" rel="tag">Postgres-XC</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/RadonDB/" rel="tag">RadonDB</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/ReplicatedMergeTree/" rel="tag">ReplicatedMergeTree</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/Select/" rel="tag">Select</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/UNIX/" rel="tag">UNIX</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/WAL/" rel="tag">WAL</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/Xenon/" rel="tag">Xenon</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/Xtrabackup/" rel="tag">Xtrabackup</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/auto-increment/" rel="tag">auto_increment</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/crontab/" rel="tag">crontab</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/daemon/" rel="tag">daemon</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/df/" rel="tag">df</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/du/" rel="tag">du</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/gcc/" rel="tag">gcc</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/gcov/" rel="tag">gcov</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/getopt/" rel="tag">getopt</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/github/" rel="tag">github</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/group-by/" rel="tag">group by</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/lcov/" rel="tag">lcov</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/libpq/" rel="tag">libpq</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/pg-constraint/" rel="tag">pg_constraint</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/pg-depend/" rel="tag">pg_depend</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/pgbench/" rel="tag">pgbench</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/pipeline/" rel="tag">pipeline</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/processor/" rel="tag">processor</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/shell/" rel="tag">shell</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E4%B8%BB%E4%BB%8E%E5%90%8C%E6%AD%A5/" rel="tag">主从同步</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E4%BC%98%E5%8C%96%E5%99%A8/" rel="tag">优化器</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E5%86%85%E5%AD%98%E5%88%86%E9%85%8D/" rel="tag">内存分配</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E5%86%85%E5%AD%98%E7%AE%A1%E7%90%86/" rel="tag">内存管理</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E5%9B%9E%E5%BD%92%E6%B5%8B%E8%AF%95/" rel="tag">回归测试</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E5%AD%97%E8%8A%82%E5%AF%B9%E9%BD%90/" rel="tag">字节对齐</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E5%AD%97%E8%8A%82%E5%BA%8F/" rel="tag">字节序</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E5%AD%98%E5%82%A8%E8%AE%A1%E7%AE%97%E5%88%86%E7%A6%BB/" rel="tag">存储计算分离</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E5%B9%B6%E8%A1%8C%E6%9F%A5%E8%AF%A2/" rel="tag">并行查询</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E5%BC%80%E6%BA%90%E5%8D%8F%E8%AE%AE/" rel="tag">开源协议</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E5%BC%80%E6%BA%90%E8%AE%B8%E5%8F%AF%E8%AF%81/" rel="tag">开源许可证</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E6%9C%AC%E5%9C%B0%E4%BA%8B%E5%8A%A1/" rel="tag">本地事务</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E6%B5%8B%E8%AF%95/" rel="tag">测试</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E6%BA%90%E7%A0%81%E5%88%86%E6%9E%90/" rel="tag">源码分析</a><span class="tag-list-count">15</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E7%B3%BB%E7%BB%9F%E8%BF%90%E7%BB%B4/" rel="tag">系统运维</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E7%BC%96%E8%AF%91%E5%99%A8/" rel="tag">编译器</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E7%BD%91%E7%BB%9C%E5%BA%8F/" rel="tag">网络序</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E7%BD%91%E7%BB%9C%E7%BC%96%E7%A8%8B/" rel="tag">网络编程</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="../../../../tags/%E9%97%AE%E9%A2%98%E5%AE%9A%E4%BD%8D/" rel="tag">问题定位</a><span class="tag-list-count">2</span></li></ul>
    </div>
  </div>


    
      
  <div class="widget">
    <h3 class="widget-title">标签云</h3>
    <div class="widget-body tagcloud">
      <a href="../../../../tags/APUE/" style="font-size: 13.33px;">APUE</a> <a href="../../../../tags/B-Tree/" style="font-size: 13px;">B-Tree</a> <a href="../../../../tags/ClickHouse/" style="font-size: 13.89px;">ClickHouse</a> <a href="../../../../tags/ClickHouse%E5%92%8C%E4%BB%96%E7%9A%84%E6%9C%8B%E5%8F%8B%E4%BB%AC/" style="font-size: 13.89px;">ClickHouse和他的朋友们</a> <a href="../../../../tags/Count/" style="font-size: 13px;">Count</a> <a href="../../../../tags/C%E8%AF%AD%E8%A8%80/" style="font-size: 13.67px;">C语言</a> <a href="../../../../tags/DAG-Scheduler/" style="font-size: 13px;">DAG Scheduler</a> <a href="../../../../tags/GreenPlum/" style="font-size: 13.22px;">GreenPlum</a> <a href="../../../../tags/HEAP%E5%BC%95%E6%93%8E/" style="font-size: 13px;">HEAP引擎</a> <a href="../../../../tags/LICENCE/" style="font-size: 13px;">LICENCE</a> <a href="../../../../tags/LSM-Tree/" style="font-size: 13px;">LSM-Tree</a> <a href="../../../../tags/Linux/" style="font-size: 13.44px;">Linux</a> <a href="../../../../tags/MEMORY%E5%BC%95%E6%93%8E/" style="font-size: 13px;">MEMORY引擎</a> <a href="../../../../tags/Makefile/" style="font-size: 13px;">Makefile</a> <a href="../../../../tags/Materialized-View/" style="font-size: 13px;">Materialized View</a> <a href="../../../../tags/MergeTree/" style="font-size: 13.11px;">MergeTree</a> <a href="../../../../tags/MySQL/" style="font-size: 13.56px;">MySQL</a> <a href="../../../../tags/Parser/" style="font-size: 13px;">Parser</a> <a href="../../../../tags/Percona/" style="font-size: 13px;">Percona</a> <a href="../../../../tags/PostgreSQL/" style="font-size: 13.78px;">PostgreSQL</a> <a href="../../../../tags/Postgres-X2/" style="font-size: 13px;">Postgres-X2</a> <a href="../../../../tags/Postgres-XC/" style="font-size: 13px;">Postgres-XC</a> <a href="../../../../tags/RadonDB/" style="font-size: 13px;">RadonDB</a> <a href="../../../../tags/ReplicatedMergeTree/" style="font-size: 13px;">ReplicatedMergeTree</a> <a href="../../../../tags/Select/" style="font-size: 13px;">Select</a> <a href="../../../../tags/UNIX/" style="font-size: 13.22px;">UNIX</a> <a href="../../../../tags/WAL/" style="font-size: 13.11px;">WAL</a> <a href="../../../../tags/Xenon/" style="font-size: 13px;">Xenon</a> <a href="../../../../tags/Xtrabackup/" style="font-size: 13px;">Xtrabackup</a> <a href="../../../../tags/auto-increment/" style="font-size: 13px;">auto_increment</a> <a href="../../../../tags/crontab/" style="font-size: 13px;">crontab</a> <a href="../../../../tags/daemon/" style="font-size: 13px;">daemon</a> <a href="../../../../tags/df/" style="font-size: 13px;">df</a> <a href="../../../../tags/du/" style="font-size: 13px;">du</a> <a href="../../../../tags/gcc/" style="font-size: 13px;">gcc</a> <a href="../../../../tags/gcov/" style="font-size: 13px;">gcov</a> <a href="../../../../tags/getopt/" style="font-size: 13px;">getopt</a> <a href="../../../../tags/github/" style="font-size: 13px;">github</a> <a href="../../../../tags/group-by/" style="font-size: 13px;">group by</a> <a href="../../../../tags/lcov/" style="font-size: 13px;">lcov</a> <a href="../../../../tags/libpq/" style="font-size: 13px;">libpq</a> <a href="../../../../tags/pg-constraint/" style="font-size: 13px;">pg_constraint</a> <a href="../../../../tags/pg-depend/" style="font-size: 13px;">pg_depend</a> <a href="../../../../tags/pgbench/" style="font-size: 13px;">pgbench</a> <a href="../../../../tags/pipeline/" style="font-size: 13px;">pipeline</a> <a href="../../../../tags/processor/" style="font-size: 13px;">processor</a> <a href="../../../../tags/shell/" style="font-size: 13px;">shell</a> <a href="../../../../tags/%E4%B8%BB%E4%BB%8E%E5%90%8C%E6%AD%A5/" style="font-size: 13.11px;">主从同步</a> <a href="../../../../tags/%E4%BC%98%E5%8C%96%E5%99%A8/" style="font-size: 13px;">优化器</a> <a href="../../../../tags/%E5%86%85%E5%AD%98%E5%88%86%E9%85%8D/" style="font-size: 13px;">内存分配</a> <a href="../../../../tags/%E5%86%85%E5%AD%98%E7%AE%A1%E7%90%86/" style="font-size: 13px;">内存管理</a> <a href="../../../../tags/%E5%9B%9E%E5%BD%92%E6%B5%8B%E8%AF%95/" style="font-size: 13px;">回归测试</a> <a href="../../../../tags/%E5%AD%97%E8%8A%82%E5%AF%B9%E9%BD%90/" style="font-size: 13.11px;">字节对齐</a> <a href="../../../../tags/%E5%AD%97%E8%8A%82%E5%BA%8F/" style="font-size: 13.11px;">字节序</a> <a href="../../../../tags/%E5%AD%98%E5%82%A8%E8%AE%A1%E7%AE%97%E5%88%86%E7%A6%BB/" style="font-size: 13px;">存储计算分离</a> <a href="../../../../tags/%E5%B9%B6%E8%A1%8C%E6%9F%A5%E8%AF%A2/" style="font-size: 13px;">并行查询</a> <a href="../../../../tags/%E5%BC%80%E6%BA%90%E5%8D%8F%E8%AE%AE/" style="font-size: 13px;">开源协议</a> <a href="../../../../tags/%E5%BC%80%E6%BA%90%E8%AE%B8%E5%8F%AF%E8%AF%81/" style="font-size: 13px;">开源许可证</a> <a href="../../../../tags/%E6%9C%AC%E5%9C%B0%E4%BA%8B%E5%8A%A1/" style="font-size: 13px;">本地事务</a> <a href="../../../../tags/%E6%B5%8B%E8%AF%95/" style="font-size: 13px;">测试</a> <a href="../../../../tags/%E6%BA%90%E7%A0%81%E5%88%86%E6%9E%90/" style="font-size: 14px;">源码分析</a> <a href="../../../../tags/%E7%B3%BB%E7%BB%9F%E8%BF%90%E7%BB%B4/" style="font-size: 13px;">系统运维</a> <a href="../../../../tags/%E7%BC%96%E8%AF%91%E5%99%A8/" style="font-size: 13px;">编译器</a> <a href="../../../../tags/%E7%BD%91%E7%BB%9C%E5%BA%8F/" style="font-size: 13.11px;">网络序</a> <a href="../../../../tags/%E7%BD%91%E7%BB%9C%E7%BC%96%E7%A8%8B/" style="font-size: 13px;">网络编程</a> <a href="../../../../tags/%E9%97%AE%E9%A2%98%E5%AE%9A%E4%BD%8D/" style="font-size: 13.11px;">问题定位</a>
    </div>
  </div>

    
      
  <div class="widget">
    <h3 class="widget-title">归档</h3>
    <div class="widget-body">
      <ul class="archive-list"><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2021/08/">八月 2021</a><span class="archive-list-count">1</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2021/01/">一月 2021</a><span class="archive-list-count">1</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2020/09/">九月 2020</a><span class="archive-list-count">3</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2020/08/">八月 2020</a><span class="archive-list-count">3</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2020/07/">七月 2020</a><span class="archive-list-count">2</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2020/06/">六月 2020</a><span class="archive-list-count">6</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2020/05/">五月 2020</a><span class="archive-list-count">1</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2019/12/">十二月 2019</a><span class="archive-list-count">1</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2019/04/">四月 2019</a><span class="archive-list-count">1</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2018/09/">九月 2018</a><span class="archive-list-count">1</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2016/11/">十一月 2016</a><span class="archive-list-count">2</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2016/04/">四月 2016</a><span class="archive-list-count">1</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2016/03/">三月 2016</a><span class="archive-list-count">3</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2016/01/">一月 2016</a><span class="archive-list-count">2</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2015/12/">十二月 2015</a><span class="archive-list-count">1</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2015/11/">十一月 2015</a><span class="archive-list-count">3</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2015/05/">五月 2015</a><span class="archive-list-count">1</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2015/01/">一月 2015</a><span class="archive-list-count">1</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2014/08/">八月 2014</a><span class="archive-list-count">3</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2014/07/">七月 2014</a><span class="archive-list-count">5</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2014/03/">三月 2014</a><span class="archive-list-count">1</span></li><li class="archive-list-item"><a class="archive-list-link" href="../../../../archives/2014/01/">一月 2014</a><span class="archive-list-count">1</span></li></ul>
    </div>
  </div>


    
      
  <div class="widget">
    <h3 class="widget-title">最新文章</h3>
    <div class="widget-body">
      <ul class="recent-post-list list-unstyled no-thumbnail">
        
          <li>
            
            <div class="item-inner">
              <p class="item-category">
                <a class="category-link" href="../../../../categories/%E9%80%9A%E7%94%A8/">通用</a>
              </p>
              <p class="item-title">
                <a href="../../../../2021/08/19/how-to-choose-open-source-licence/" class="title">技术分享 | 如何为你的代码选择一个合适的开源协议？</a>
              </p>
              <p class="item-date">
                <time datetime="2021-08-18T16:37:15.000Z" itemprop="datePublished">2021-08-19</time>
              </p>
            </div>
          </li>
          
          <li>
            
            <div class="item-inner">
              <p class="item-category">
                <a class="category-link" href="../../../../categories/ClickHouse/">ClickHouse</a>
              </p>
              <p class="item-title">
                <a href="../../../../2021/01/26/clickhouse-and-friends-15-groupby/" class="title">源码分析 | ClickHouse和他的朋友们（15）Group By 为什么这么快</a>
              </p>
              <p class="item-date">
                <time datetime="2021-01-26T13:31:12.000Z" itemprop="datePublished">2021-01-26</time>
              </p>
            </div>
          </li>
          
          <li>
            
            <div class="item-inner">
              <p class="item-category">
                <a class="category-link" href="../../../../categories/ClickHouse/">ClickHouse</a>
              </p>
              <p class="item-title">
                <a href="../../../../2020/09/21/clickhouse-and-friends-14-compute-storage/" class="title">源码分析 | ClickHouse和他的朋友们（14）存储计算分离方案与实现</a>
              </p>
              <p class="item-date">
                <time datetime="2020-09-21T14:01:12.000Z" itemprop="datePublished">2020-09-21</time>
              </p>
            </div>
          </li>
          
          <li>
            
            <div class="item-inner">
              <p class="item-category">
                <a class="category-link" href="../../../../categories/ClickHouse/">ClickHouse</a>
              </p>
              <p class="item-title">
                <a href="../../../../2020/09/15/clickhouse-and-friends-13-replicated-merge-tree/" class="title">源码分析 | ClickHouse和他的朋友们（13）ReplicatedMergeTree表引擎及同步机制</a>
              </p>
              <p class="item-date">
                <time datetime="2020-09-15T12:15:14.000Z" itemprop="datePublished">2020-09-15</time>
              </p>
            </div>
          </li>
          
          <li>
            
            <div class="item-inner">
              <p class="item-category">
                <a class="category-link" href="../../../../categories/ClickHouse/">ClickHouse</a>
              </p>
              <p class="item-title">
                <a href="../../../../2020/09/03/clickhouse-and-friends-12-materialized-view/" class="title">源码分析 | ClickHouse和他的朋友们（12）神奇的物化视图(Materialized View)与原理</a>
              </p>
              <p class="item-date">
                <time datetime="2020-09-03T13:22:14.000Z" itemprop="datePublished">2020-09-03</time>
              </p>
            </div>
          </li>
          
      </ul>
    </div>
  </div>
  

    
  </div>
</aside>

  
  
<aside class="sidebar sidebar-toc collapse" id="collapseToc" itemscope itemtype="http://schema.org/WPSideBar">
  <div class="slimContent">
    <nav id="toc" class="article-toc">
      <h3 class="toc-title">文章目录</h3>
      <ol class="toc"><li class="toc-item toc-level-1"><a class="toc-link" href="#%E7%8E%AF%E5%A2%83"><span class="toc-number">1.</span> <span class="toc-text">环境</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#%E5%AE%89%E8%A3%85"><span class="toc-number">2.</span> <span class="toc-text">安装</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#%E5%8F%82%E6%95%B0%E4%BB%8B%E7%BB%8D"><span class="toc-number">3.</span> <span class="toc-text">参数介绍</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#%E5%88%9D%E5%A7%8B%E5%8C%96%E6%B5%8B%E8%AF%95%E6%95%B0%E6%8D%AE"><span class="toc-number">4.</span> <span class="toc-text">初始化测试数据</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#%E6%B5%8B%E8%AF%95"><span class="toc-number">5.</span> <span class="toc-text">测试</span></a><ol class="toc-child"><li class="toc-item toc-level-2"><a class="toc-link" href="#1%E4%B8%AAsession"><span class="toc-number">5.1.</span> <span class="toc-text">1个session</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#2-50%E4%B8%AAsession"><span class="toc-number">5.2.</span> <span class="toc-text">2. 50个session</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#3-100%E4%B8%AAsession"><span class="toc-number">5.3.</span> <span class="toc-text">3. 100个session</span></a></li></ol></li><li class="toc-item toc-level-1"><a class="toc-link" href="#%E5%8F%82%E8%80%83"><span class="toc-number">6.</span> <span class="toc-text">参考</span></a></li></ol>
    </nav>
  </div>
</aside>

<main class="main" role="main">
  <div class="content">
  <article id="post-example-of-postgresql-pgbench" class="article article-type-post" itemscope itemtype="http://schema.org/BlogPosting">
    
    <div class="article-header">
      
        
  
    <h1 class="article-title" itemprop="name">
      实用工具 | PostgreSQL 数据库压力测试工具 pgbench 使用示例
    </h1>
  

      
      <div class="article-meta">
        <span class="article-date">
    <i class="icon icon-calendar-check"></i>
	<a href="" class="article-date">
	  <time datetime="2015-12-23T13:04:17.000Z" itemprop="datePublished">2015-12-23</time>
	</a>
</span>
        
  <span class="article-category">
    <i class="icon icon-folder"></i>
    <a class="article-category-link" href="../../../../categories/PostgreSQL/">PostgreSQL</a>
  </span>

        
  <span class="article-tag">
    <i class="icon icon-tags"></i>
	<a class="article-tag-link-link" href="../../../../tags/PostgreSQL/" rel="tag">PostgreSQL</a>, <a class="article-tag-link-link" href="../../../../tags/pgbench/" rel="tag">pgbench</a>
  </span>


        
	<span class="article-read hidden-xs">
	    <i class="icon icon-eye-fill" aria-hidden="true"></i>
	    <span id="busuanzi_container_page_pv">
			<span id="busuanzi_value_page_pv">0</span>
		</span>
	</span>


        <span class="post-comment"><i class="icon icon-comment"></i> <a href="#comments" class="article-comment-link">评论</a></span>
        
	
		<span class="post-wordcount hidden-xs" itemprop="wordCount">字数统计: 1.6k(字)</span>
	
	
		<span class="post-readcount hidden-xs" itemprop="timeRequired">阅读时长: 8(分)</span>
	

      </div>
    </div>
    <div class="article-entry marked-body" itemprop="articleBody">
      
        <span id="more"></span>

<blockquote>
<p><strong>本文首发于 2015-12-23 21:04:17</strong></p>
</blockquote>
<h1 id="环境"><a href="#环境" class="headerlink" title="环境"></a>环境</h1><p>PG数据库提供了一款轻量级的压力测试工具叫 <code>pgbench</code>，其实就是一个编译好后的扩展性的可执行文件。</p>
<p><strong>测试环境：</strong></p>
<blockquote>
<p>CentOS 5.7 in VMWare 8.0</p>
<p>PG：9.1.2</p>
</blockquote>
<p><strong>数据库参数：</strong></p>
<blockquote>
<p>max_connection=100</p>
<p>其他默认</p>
<p><strong>注意：</strong> 本文只为说明 <code>pgbench</code> 的使用方法，因此，并未对数据库参数调优。</p>
</blockquote>
<h1 id="安装"><a href="#安装" class="headerlink" title="安装"></a>安装</h1><p>进入源码安装包，编译、安装：</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">cd</span> postgresql-9.1.2/contrib/pgbench/</span><br><span class="line">make all</span><br><span class="line">make install</span><br></pre></td></tr></table></figure>

<p>安装完毕以后可以在 bin 文件夹下看到新生成的 pgbench 文件：</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">$ ll <span class="variable">$PGHOME</span>/bin/pgbench</span><br><span class="line">-rwxr-xr-x. 1 postgres postgres 50203 Jul  8 20:28 pgbench</span><br></pre></td></tr></table></figure>

<h1 id="参数介绍"><a href="#参数介绍" class="headerlink" title="参数介绍"></a>参数介绍</h1><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br></pre></td><td class="code"><pre><span class="line">[postgres@localhost  bin]$ pgbench --<span class="built_in">help</span></span><br><span class="line">pgbench is a benchmarking tool <span class="keyword">for</span> PostgreSQL.</span><br><span class="line"></span><br><span class="line">Usage:</span><br><span class="line">  pgbench [OPTIONS]... [DBNAME]</span><br><span class="line"></span><br><span class="line">Initialization options:</span><br><span class="line">  -i           invokes initialization mode</span><br><span class="line">  -F NUM       fill factor</span><br><span class="line">  -s NUM       scaling factor</span><br><span class="line"></span><br><span class="line">Benchmarking options:</span><br><span class="line">  -c NUM       number of concurrent database clients (default: 1)</span><br><span class="line">  -C           establish new connection <span class="keyword">for</span> each transaction</span><br><span class="line">  -D VARNAME=VALUE</span><br><span class="line">               define variable <span class="keyword">for</span> use by custom script</span><br><span class="line">  -f FILENAME  <span class="built_in">read</span> transaction script from FILENAME</span><br><span class="line">  -j NUM       number of threads (default: 1)</span><br><span class="line">  -l           write transaction <span class="built_in">times</span> to <span class="built_in">log</span> file</span><br><span class="line">  -M &#123;simple|extended|prepared&#125;</span><br><span class="line">               protocol <span class="keyword">for</span> submitting queries to server (default: simple)</span><br><span class="line">  -n           <span class="keyword">do</span> not run VACUUM before tests</span><br><span class="line">  -N           <span class="keyword">do</span> not update tables <span class="string">&quot;pgbench_tellers&quot;</span> and <span class="string">&quot;pgbench_branches&quot;</span></span><br><span class="line">  -r           report average latency per <span class="built_in">command</span></span><br><span class="line">  -s NUM       report this scale factor <span class="keyword">in</span> output</span><br><span class="line">  -S           perform SELECT-only transactions</span><br><span class="line">  -t NUM       number of transactions each client runs (default: 10)</span><br><span class="line">  -T NUM       duration of benchmark <span class="built_in">test</span> <span class="keyword">in</span> seconds</span><br><span class="line">  -v           vacuum all four standard tables before tests</span><br><span class="line"></span><br><span class="line">Common options:</span><br><span class="line">  -d           <span class="built_in">print</span> debugging output</span><br><span class="line">  -h HOSTNAME  database server host or socket directory</span><br><span class="line">  -p PORT      database server port number</span><br><span class="line">  -U USERNAME  connect as specified database user</span><br><span class="line">  --<span class="built_in">help</span>       show this <span class="built_in">help</span>, <span class="keyword">then</span> <span class="built_in">exit</span></span><br><span class="line">  --version    output version information, <span class="keyword">then</span> <span class="built_in">exit</span></span><br></pre></td></tr></table></figure>

<p>部分参数中文含义：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br></pre></td><td class="code"><pre><span class="line">-c, --client=NUM</span><br><span class="line">数据库客户端数量, 可以理解为数据库会话数量(postgres进程数), 默认为1</span><br><span class="line"></span><br><span class="line">-C, --connect</span><br><span class="line">每个事务创建一个连接,由于PG使用进程模型, 可以测试频繁Kill/Create进程的性能表现</span><br><span class="line"></span><br><span class="line">-j, --jobs=NUM</span><br><span class="line">pgbench的工作线程数</span><br><span class="line"></span><br><span class="line">-T, --time=NUM</span><br><span class="line">以秒为单位的压测时长</span><br><span class="line"></span><br><span class="line">-v, --vacuum-all</span><br><span class="line">每次测试前执行vacuum命令, 避免&quot;垃圾&quot;空间的影响</span><br><span class="line"></span><br><span class="line">-M, --protocol=simple|extended|prepared</span><br><span class="line">提交查询命令到服务器使用的协议, simple是默认选项, prepared是类似绑定</span><br><span class="line"></span><br><span class="line">-r, --report-latencies</span><br><span class="line">报告每条命令(SQL语句)的平均延时</span><br><span class="line"></span><br><span class="line">-S, --select-only</span><br><span class="line">只执行查询语句</span><br></pre></td></tr></table></figure>

<h1 id="初始化测试数据"><a href="#初始化测试数据" class="headerlink" title="初始化测试数据"></a>初始化测试数据</h1><p>初始化数据：</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line">[postgres@localhost  ~]$ pgbench -i pgbench</span><br><span class="line">creating tables...</span><br><span class="line">10000 tuples <span class="keyword">done</span>.</span><br><span class="line">20000 tuples <span class="keyword">done</span>.</span><br><span class="line">30000 tuples <span class="keyword">done</span>.</span><br><span class="line">40000 tuples <span class="keyword">done</span>.</span><br><span class="line">50000 tuples <span class="keyword">done</span>.</span><br><span class="line">60000 tuples <span class="keyword">done</span>.</span><br><span class="line">70000 tuples <span class="keyword">done</span>.</span><br><span class="line">80000 tuples <span class="keyword">done</span>.</span><br><span class="line">90000 tuples <span class="keyword">done</span>.</span><br><span class="line">100000 tuples <span class="keyword">done</span>.</span><br><span class="line"><span class="built_in">set</span> primary key...</span><br><span class="line">NOTICE:  ALTER TABLE / ADD PRIMARY KEY will create implicit index <span class="string">&quot;pgbench_branches_pkey&quot;</span> <span class="keyword">for</span> table <span class="string">&quot;pgbench_branches&quot;</span></span><br><span class="line">NOTICE:  ALTER TABLE / ADD PRIMARY KEY will create implicit index <span class="string">&quot;pgbench_tellers_pkey&quot;</span> <span class="keyword">for</span> table <span class="string">&quot;pgbench_tellers&quot;</span></span><br><span class="line">NOTICE:  ALTER TABLE / ADD PRIMARY KEY will create implicit index <span class="string">&quot;pgbench_accounts_pkey&quot;</span> <span class="keyword">for</span> table <span class="string">&quot;pgbench_accounts&quot;</span></span><br><span class="line">vacuum...done.</span><br></pre></td></tr></table></figure>

<p>查看表数据：</p>
<figure class="highlight sql"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><span class="line">[postgres<span class="variable">@localhost</span>  <span class="operator">~</span>]$ psql <span class="operator">-</span>d pgbench</span><br><span class="line">psql (<span class="number">9.1</span><span class="number">.2</span>)</span><br><span class="line">Type &quot;help&quot; <span class="keyword">for</span> help.</span><br><span class="line"></span><br><span class="line">pgbench<span class="operator">=</span># <span class="keyword">select</span> <span class="built_in">count</span>(<span class="number">1</span>) <span class="keyword">from</span> pgbench_accounts;</span><br><span class="line"> count</span><br><span class="line"><span class="comment">--------</span></span><br><span class="line"> <span class="number">100000</span></span><br><span class="line">(<span class="number">1</span> <span class="type">row</span>)</span><br><span class="line"></span><br><span class="line">pgbench<span class="operator">=</span># <span class="keyword">select</span> <span class="built_in">count</span>(<span class="number">1</span>) <span class="keyword">from</span> pgbench_branches;</span><br><span class="line"> count</span><br><span class="line"><span class="comment">-------</span></span><br><span class="line">     <span class="number">1</span></span><br><span class="line">(<span class="number">1</span> <span class="type">row</span>)</span><br><span class="line"></span><br><span class="line">pgbench<span class="operator">=</span># <span class="keyword">select</span> <span class="built_in">count</span>(<span class="number">1</span>) <span class="keyword">from</span> pgbench_history;</span><br><span class="line"> count</span><br><span class="line"><span class="comment">-------</span></span><br><span class="line">     <span class="number">0</span></span><br><span class="line">(<span class="number">1</span> <span class="type">row</span>)</span><br><span class="line"></span><br><span class="line">pgbench<span class="operator">=</span># <span class="keyword">select</span> <span class="built_in">count</span>(<span class="number">1</span>) <span class="keyword">from</span> pgbench_tellers;</span><br><span class="line"> count</span><br><span class="line"><span class="comment">-------</span></span><br><span class="line">    <span class="number">10</span></span><br><span class="line">(<span class="number">1</span> <span class="type">row</span>)</span><br></pre></td></tr></table></figure>

<p>查看表结构：</p>
<figure class="highlight sql"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br></pre></td><td class="code"><pre><span class="line">pgbench<span class="operator">=</span># \d<span class="operator">+</span> pgbench_accounts</span><br><span class="line">                <span class="keyword">Table</span> &quot;public.pgbench_accounts&quot;</span><br><span class="line">  <span class="keyword">Column</span>  <span class="operator">|</span>     Type      <span class="operator">|</span> Modifiers <span class="operator">|</span> Storage  <span class="operator">|</span> Description</span><br><span class="line"><span class="comment">----------+---------------+-----------+----------+-------------</span></span><br><span class="line"> aid      <span class="operator">|</span> <span class="type">integer</span>       <span class="operator">|</span> <span class="keyword">not</span> <span class="keyword">null</span>  <span class="operator">|</span> plain    <span class="operator">|</span></span><br><span class="line"> bid      <span class="operator">|</span> <span class="type">integer</span>       <span class="operator">|</span>           <span class="operator">|</span> plain    <span class="operator">|</span></span><br><span class="line"> abalance <span class="operator">|</span> <span class="type">integer</span>       <span class="operator">|</span>           <span class="operator">|</span> plain    <span class="operator">|</span></span><br><span class="line"> filler   <span class="operator">|</span> <span class="type">character</span>(<span class="number">84</span>) <span class="operator">|</span>           <span class="operator">|</span> extended <span class="operator">|</span></span><br><span class="line">Indexes:</span><br><span class="line">    &quot;pgbench_accounts_pkey&quot; <span class="keyword">PRIMARY</span> KEY, btree (aid)</span><br><span class="line">Has OIDs: <span class="keyword">no</span></span><br><span class="line">Options: fillfactor<span class="operator">=</span><span class="number">100</span></span><br><span class="line"></span><br><span class="line">pgbench<span class="operator">=</span># \d<span class="operator">+</span> pgbench_branches</span><br><span class="line">                <span class="keyword">Table</span> &quot;public.pgbench_branches&quot;</span><br><span class="line">  <span class="keyword">Column</span>  <span class="operator">|</span>     Type      <span class="operator">|</span> Modifiers <span class="operator">|</span> Storage  <span class="operator">|</span> Description</span><br><span class="line"><span class="comment">----------+---------------+-----------+----------+-------------</span></span><br><span class="line"> bid      <span class="operator">|</span> <span class="type">integer</span>       <span class="operator">|</span> <span class="keyword">not</span> <span class="keyword">null</span>  <span class="operator">|</span> plain    <span class="operator">|</span></span><br><span class="line"> bbalance <span class="operator">|</span> <span class="type">integer</span>       <span class="operator">|</span>           <span class="operator">|</span> plain    <span class="operator">|</span></span><br><span class="line"> filler   <span class="operator">|</span> <span class="type">character</span>(<span class="number">88</span>) <span class="operator">|</span>           <span class="operator">|</span> extended <span class="operator">|</span></span><br><span class="line">Indexes:</span><br><span class="line">    &quot;pgbench_branches_pkey&quot; <span class="keyword">PRIMARY</span> KEY, btree (bid)</span><br><span class="line">Has OIDs: <span class="keyword">no</span></span><br><span class="line">Options: fillfactor<span class="operator">=</span><span class="number">100</span></span><br><span class="line"></span><br><span class="line">pgbench<span class="operator">=</span># \d<span class="operator">+</span> pgbench_history</span><br><span class="line">                      <span class="keyword">Table</span> &quot;public.pgbench_history&quot;</span><br><span class="line"> <span class="keyword">Column</span> <span class="operator">|</span>            Type             <span class="operator">|</span> Modifiers <span class="operator">|</span> Storage  <span class="operator">|</span> Description</span><br><span class="line"><span class="comment">--------+-----------------------------+-----------+----------+-------------</span></span><br><span class="line"> tid    <span class="operator">|</span> <span class="type">integer</span>                     <span class="operator">|</span>           <span class="operator">|</span> plain    <span class="operator">|</span></span><br><span class="line"> bid    <span class="operator">|</span> <span class="type">integer</span>                     <span class="operator">|</span>           <span class="operator">|</span> plain    <span class="operator">|</span></span><br><span class="line"> aid    <span class="operator">|</span> <span class="type">integer</span>                     <span class="operator">|</span>           <span class="operator">|</span> plain    <span class="operator">|</span></span><br><span class="line"> delta  <span class="operator">|</span> <span class="type">integer</span>                     <span class="operator">|</span>           <span class="operator">|</span> plain    <span class="operator">|</span></span><br><span class="line"> mtime  <span class="operator">|</span> <span class="type">timestamp</span> <span class="keyword">without</span> <span class="type">time</span> zone <span class="operator">|</span>           <span class="operator">|</span> plain    <span class="operator">|</span></span><br><span class="line"> filler <span class="operator">|</span> <span class="type">character</span>(<span class="number">22</span>)               <span class="operator">|</span>           <span class="operator">|</span> extended <span class="operator">|</span></span><br><span class="line">Has OIDs: <span class="keyword">no</span></span><br><span class="line"></span><br><span class="line">pgbench<span class="operator">=</span># \d<span class="operator">+</span> pgbench_tellers</span><br><span class="line">                <span class="keyword">Table</span> &quot;public.pgbench_tellers&quot;</span><br><span class="line">  <span class="keyword">Column</span>  <span class="operator">|</span>     Type      <span class="operator">|</span> Modifiers <span class="operator">|</span> Storage  <span class="operator">|</span> Description</span><br><span class="line"><span class="comment">----------+---------------+-----------+----------+-------------</span></span><br><span class="line"> tid      <span class="operator">|</span> <span class="type">integer</span>       <span class="operator">|</span> <span class="keyword">not</span> <span class="keyword">null</span>  <span class="operator">|</span> plain    <span class="operator">|</span></span><br><span class="line"> bid      <span class="operator">|</span> <span class="type">integer</span>       <span class="operator">|</span>           <span class="operator">|</span> plain    <span class="operator">|</span></span><br><span class="line"> tbalance <span class="operator">|</span> <span class="type">integer</span>       <span class="operator">|</span>           <span class="operator">|</span> plain    <span class="operator">|</span></span><br><span class="line"> filler   <span class="operator">|</span> <span class="type">character</span>(<span class="number">84</span>) <span class="operator">|</span>           <span class="operator">|</span> extended <span class="operator">|</span></span><br><span class="line">Indexes:</span><br><span class="line">    &quot;pgbench_tellers_pkey&quot; <span class="keyword">PRIMARY</span> KEY, btree (tid)</span><br><span class="line">Has OIDs: <span class="keyword">no</span></span><br><span class="line">Options: fillfactor<span class="operator">=</span><span class="number">100</span></span><br></pre></td></tr></table></figure>

<p><strong>说明：</strong></p>
<ol>
<li>这里使用的是默认的参数值，<code>-s</code>参数时可指定测试数据的数据量，<code>-f</code>可以指定测试的脚本，这里用的是默认脚本。</li>
<li>不要在生产的库上做，新建一个测试库（当生产上有同名的测试表时将被重置）。</li>
</ol>
<h1 id="测试"><a href="#测试" class="headerlink" title="测试"></a>测试</h1><h2 id="1个session"><a href="#1个session" class="headerlink" title="1个session"></a>1个session</h2><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br></pre></td><td class="code"><pre><span class="line">[postgres@localhost  ~]$ nohup pgbench -c 1 -T 20 -r pgbench &gt; file.out  2&gt;&amp;1</span><br><span class="line">[postgres@localhost  ~]$ more file.out</span><br><span class="line">nohup: ignoring input</span><br><span class="line">starting vacuum...end.</span><br><span class="line">transaction <span class="built_in">type</span>: TPC-B (sort of)</span><br><span class="line">scaling factor: 1</span><br><span class="line">query mode: simple</span><br><span class="line">number of clients: 1</span><br><span class="line">number of threads: 1</span><br><span class="line">duration: 20 s</span><br><span class="line">number of transactions actually processed: 12496                                                                                     tps = 624.747958 (including connections establishing)                                                                                tps = 625.375564 (excluding connections establishing)</span><br><span class="line">statement latencies <span class="keyword">in</span> milliseconds:</span><br><span class="line">        0.005299        \<span class="built_in">set</span> nbranches 1 * :scale</span><br><span class="line">        0.000619        \<span class="built_in">set</span> ntellers 10 * :scale</span><br><span class="line">        0.000492        \<span class="built_in">set</span> naccounts 100000 * :scale</span><br><span class="line">        0.000700        \setrandom aid 1 :naccounts</span><br><span class="line">        0.000400        \setrandom bid 1 :nbranches</span><br><span class="line">        0.000453        \setrandom tid 1 :ntellers</span><br><span class="line">        0.000430        \setrandom delta -5000 5000</span><br><span class="line">        0.050707        BEGIN;</span><br><span class="line">        0.200909        UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid;</span><br><span class="line">        0.098718        SELECT abalance FROM pgbench_accounts WHERE aid = :aid;</span><br><span class="line">        0.111621        UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid;</span><br><span class="line">        0.107297        UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid;</span><br><span class="line">        0.095156        INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);</span><br><span class="line">        0.919101        END;</span><br></pre></td></tr></table></figure>

<h2 id="2-50个session"><a href="#2-50个session" class="headerlink" title="2. 50个session"></a>2. 50个session</h2><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br></pre></td><td class="code"><pre><span class="line">[postgres@localhost  ~]<span class="variable">$nohup</span> pgbench -c 50 -T 20 -r pgbench &gt; file.out  2&gt;&amp;1</span><br><span class="line">[postgres@localhost  ~]$ more file.out</span><br><span class="line">nohup: ignoring input</span><br><span class="line">starting vacuum...end.</span><br><span class="line">transaction <span class="built_in">type</span>: TPC-B (sort of)</span><br><span class="line">scaling factor: 1</span><br><span class="line">query mode: simple</span><br><span class="line">number of clients: 50</span><br><span class="line">number of threads: 1</span><br><span class="line">duration: 20 s</span><br><span class="line">number of transactions actually processed: 7504                                                                                      tps = 370.510431 (including connections establishing)                                                                               tps = 377.964565 (excluding connections establishing)</span><br><span class="line">statement latencies <span class="keyword">in</span> milliseconds:</span><br><span class="line">        0.004291        \<span class="built_in">set</span> nbranches 1 * :scale</span><br><span class="line">        0.000769        \<span class="built_in">set</span> ntellers 10 * :scale</span><br><span class="line">        0.000955        \<span class="built_in">set</span> naccounts 100000 * :scale</span><br><span class="line">        0.000865        \setrandom aid 1 :naccounts</span><br><span class="line">        0.000513        \setrandom bid 1 :nbranches</span><br><span class="line">        0.000580        \setrandom tid 1 :ntellers</span><br><span class="line">        0.000522        \setrandom delta -5000 5000</span><br><span class="line">        0.604671        BEGIN;</span><br><span class="line">        1.480723        UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid;</span><br><span class="line">        0.401148        SELECT abalance FROM pgbench_accounts WHERE aid = :aid;</span><br><span class="line">        104.713566      UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid;</span><br><span class="line">        21.562787       UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid;</span><br><span class="line">        0.412209        INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);</span><br><span class="line">        2.243497        END;</span><br></pre></td></tr></table></figure>

<h2 id="3-100个session"><a href="#3-100个session" class="headerlink" title="3. 100个session"></a>3. 100个session</h2><p>超过100个会报错，因为数据库当前设置最大 session 是100。</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br></pre></td><td class="code"><pre><span class="line">[postgres@localhost  ~]$ nohup pgbench -c 100 -T 20 -r pgbench&gt; file.out  2&gt;&amp;1</span><br><span class="line">[postgres@localhost  ~]$ more file.out</span><br><span class="line">nohup: ignoring input</span><br><span class="line">starting vacuum...end.</span><br><span class="line">transaction <span class="built_in">type</span>: TPC-B (sort of)</span><br><span class="line">scaling factor: 1</span><br><span class="line">query mode: simple</span><br><span class="line">number of clients: 100</span><br><span class="line">number of threads: 1</span><br><span class="line">duration: 20 s</span><br><span class="line">number of transactions actually processed: 6032                                                                                      tps = 292.556692 (including connections establishing)                                                                                tps = 305.595090 (excluding connections establishing)</span><br><span class="line">statement latencies <span class="keyword">in</span> milliseconds:</span><br><span class="line">        0.004508        \<span class="built_in">set</span> nbranches 1 * :scale</span><br><span class="line">        0.000787        \<span class="built_in">set</span> ntellers 10 * :scale</span><br><span class="line">        0.000879        \<span class="built_in">set</span> naccounts 100000 * :scale</span><br><span class="line">        0.001620        \setrandom aid 1 :naccounts</span><br><span class="line">        0.000485        \setrandom bid 1 :nbranches</span><br><span class="line">        0.000561        \setrandom tid 1 :ntellers</span><br><span class="line">        0.000656        \setrandom delta -5000 5000</span><br><span class="line">        3.660809        BEGIN;</span><br><span class="line">        4.198062        UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid;</span><br><span class="line">        1.727076        SELECT abalance FROM pgbench_accounts WHERE aid = :aid;</span><br><span class="line">        281.955832      UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid;</span><br><span class="line">        27.054125       UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid;</span><br><span class="line">        0.524155        INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);</span><br><span class="line">        2.710619        END;</span><br></pre></td></tr></table></figure>

<h1 id="参考"><a href="#参考" class="headerlink" title="参考"></a>参考</h1><p><a target="_blank" rel="noopener" href="http://www.postgresql.org/docs/9.1/static/pgbench.html">http://www.postgresql.org/docs/9.1/static/pgbench.html</a></p>
<hr>
<p>欢迎关注我的微信公众号【数据库内核】：分享主流开源数据库和存储引擎相关技术。</p>
<img src="https://dbkernel-1306518848.cos.ap-beijing.myqcloud.com/wechat/my-wechat-official-account.png" width="400" height="400" alt="欢迎关注公众号数据库内核" align="center"/>


<table>
<thead>
<tr>
<th>标题</th>
<th>网址</th>
</tr>
</thead>
<tbody><tr>
<td>GitHub</td>
<td><a href="https://dbkernel.github.io/">https://dbkernel.github.io</a></td>
</tr>
<tr>
<td>知乎</td>
<td><a target="_blank" rel="noopener" href="https://www.zhihu.com/people/dbkernel/posts">https://www.zhihu.com/people/dbkernel/posts</a></td>
</tr>
<tr>
<td>思否（SegmentFault）</td>
<td><a target="_blank" rel="noopener" href="https://segmentfault.com/u/dbkernel">https://segmentfault.com/u/dbkernel</a></td>
</tr>
<tr>
<td>掘金</td>
<td><a target="_blank" rel="noopener" href="https://juejin.im/user/5e9d3ed251882538083fed1f/posts">https://juejin.im/user/5e9d3ed251882538083fed1f/posts</a></td>
</tr>
<tr>
<td>开源中国（oschina）</td>
<td><a target="_blank" rel="noopener" href="https://my.oschina.net/dbkernel">https://my.oschina.net/dbkernel</a></td>
</tr>
<tr>
<td>博客园（cnblogs）</td>
<td><a target="_blank" rel="noopener" href="https://www.cnblogs.com/dbkernel">https://www.cnblogs.com/dbkernel</a></td>
</tr>
</tbody></table>

      
    </div>
    <div class="article-footer">
      <blockquote class="mt-2x">
  <ul class="post-copyright list-unstyled">
    
    <li class="post-copyright-link hidden-xs">
      <strong>本文链接：</strong>
      <a href="http://dbkernel.github.io/2015/12/23/example-of-postgresql-pgbench/" title="实用工具 | PostgreSQL 数据库压力测试工具 pgbench 使用示例" target="_blank" rel="external">http://dbkernel.github.io/2015/12/23/example-of-postgresql-pgbench/</a>
    </li>
    
    <li class="post-copyright-license">
      <strong>版权声明： </strong> 本博客所有文章除特别声明外，均采用 <a href="http://creativecommons.org/licenses/by/4.0/deed.zh" target="_blank" rel="external">CC BY 4.0 CN 许可协议</a>，转载请注明出处！
    </li>
  </ul>
</blockquote>


<div class="panel panel-default panel-badger">
  <div class="panel-body">
    <figure class="media">
      <div class="media-left">
        <a href="https://github.com/dbkernel" target="_blank" class="img-burn thumb-sm visible-lg">
          <img src="../../../../images/avatar.png" class="img-rounded w-full" alt="">
        </a>
      </div>
      <div class="media-body">
        <h3 class="media-heading"><a href="https://github.com/dbkernel" target="_blank"><span class="text-dark">DBKernel</span><small class="ml-1x">资深数据库开发工程师</small></a></h3>
        <div>目前从事云数据库MySQL/PostgreSQL的研发工作，曾做过PGXC、Greenplum等分布式数据库的内核开发。热衷于研究主流数据库架构、源码，对关系型数据库 MySQL/PostgreSQL及分布式数据库有深入研究。</div>
      </div>
    </figure>
  </div>
</div>


    </div>
  </article>
  
    
  <section id="comments">
  	
           
    
  </section>


  
</div>

  <nav class="bar bar-footer clearfix" data-stick-bottom>
  <div class="bar-inner">
  
  <ul class="pager pull-left">
    
    <li class="prev">
      <a href="../../../../2016/01/14/how-to-install-greenplum-on-linux/" title="最佳实践 | CentOS 和 Ubuntu 下安装配置 GreenPlum 数据库集群 - 源码 &amp; 安装包"><i class="icon icon-angle-left" aria-hidden="true"></i><span>&nbsp;&nbsp;上一篇</span></a>
    </li>
    
    
    <li class="next">
      <a href="../../../11/21/postgresql-primary-standby-streaming-replication/" title="特性分析 | PostgreSQL Primary/Standby 主备流复制机制"><span>下一篇&nbsp;&nbsp;</span><i class="icon icon-angle-right" aria-hidden="true"></i></a>
    </li>
    
    
    <li class="toggle-toc">
      <a class="toggle-btn collapsed" data-toggle="collapse" href="#collapseToc" aria-expanded="false" title="文章目录" role="button">
        <span>[&nbsp;</span><span>文章目录</span>
        <i class="text-collapsed icon icon-anchor"></i>
        <i class="text-in icon icon-close"></i>
        <span>]</span>
      </a>
    </li>
    
  </ul>
  
  
  <!-- Button trigger modal -->
  <button type="button" class="btn btn-fancy btn-donate pop-onhover bg-gradient-warning" data-toggle="modal" data-target="#donateModal"><span>赏</span></button>
  <!-- <div class="wave-icon wave-icon-danger btn-donate" data-toggle="modal" data-target="#donateModal">
    <div class="wave-circle"><span class="icon"><i class="icon icon-bill"></i></span></div>
  </div> -->
  
  
  <div class="bar-right">
    
    <div class="share-component" data-sites="weibo,qq,wechat,qzone,facebook,twitter,linkedin" data-mobile-sites="weibo,qq,wechat,qzone,linkedin"></div>
    
  </div>
  </div>
</nav>
  
<!-- Modal -->
<div class="modal modal-center modal-small modal-xs-full fade" id="donateModal" tabindex="-1" role="dialog">
  <div class="modal-dialog" role="document">
    <div class="modal-content donate">
      <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
      <div class="modal-body">
        <div class="donate-box">
          <div class="donate-head">
            <p>感谢您的支持，我会继续努力的!</p>
          </div>
          <div class="tab-content">
            <div role="tabpanel" class="tab-pane fade active in" id="alipay">
              <div class="donate-payimg">
                <img src="../../../../images/donate/alipayimg.png" alt="扫码支持" title="扫一扫" />
              </div>
              <p class="text-muted mv">扫码打赏，你说多少就多少</p>
              <p class="text-grey">打开支付宝扫一扫，即可进行扫码打赏哦</p>
            </div>
            <div role="tabpanel" class="tab-pane fade" id="wechatpay">
              <div class="donate-payimg">
                <img src="../../../../images/donate/wechatpayimg.png" alt="扫码支持" title="扫一扫" />
              </div>
              <p class="text-muted mv">扫码打赏，你说多少就多少</p>
              <p class="text-grey">打开微信扫一扫，即可进行扫码打赏哦</p>
            </div>
          </div>
          <div class="donate-footer">
            <ul class="nav nav-tabs nav-justified" role="tablist">
              <li role="presentation" class="active">
                <a href="#alipay" id="alipay-tab" role="tab" data-toggle="tab" aria-controls="alipay" aria-expanded="true"><i class="icon icon-alipay"></i> 支付宝</a>
              </li>
              <li role="presentation" class="">
                <a href="#wechatpay" role="tab" id="wechatpay-tab" data-toggle="tab" aria-controls="wechatpay" aria-expanded="false"><i class="icon icon-wepay"></i> 微信支付</a>
              </li>
            </ul>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>



</main>

  <footer class="footer" itemscope itemtype="http://schema.org/WPFooter">
	
	
    <ul class="social-links">
    	
        <li><a href="../../../../https:/github.com/dbkernel" target="_blank" title="Github" data-toggle=tooltip data-placement=top><i class="icon icon-github"></i></a></li>
        
        <li><a href="../../../../atom.xml" target="_blank" title="Rss" data-toggle=tooltip data-placement=top><i class="icon icon-rss"></i></a></li>
        
    </ul>

    <div class="copyright">
    	
        &copy; 2022 DBKernel
        
        <div class="publishby">
        	Theme by <a href="https://github.com/cofess" target="_blank"> cofess </a>base on <a href="https://github.com/cofess/hexo-theme-pure" target="_blank">pure</a>.
        </div>
    </div>
</footer>
  <script src="//cdn.jsdelivr.net/npm/jquery@1.12.4/dist/jquery.min.js"></script>
<script>
window.jQuery || document.write('<script src="js/jquery.min.js"><\/script>')
</script>

<script src="../../../../js/plugin.min.js"></script>


<script src="../../../../js/application.js"></script>


    <script>
(function (window) {
    var INSIGHT_CONFIG = {
        TRANSLATION: {
            POSTS: '文章',
            PAGES: '页面',
            CATEGORIES: '分类',
            TAGS: '标签',
            UNTITLED: '(未命名)',
        },
        ROOT_URL: '/',
        CONTENT_URL: '../../../../content.json',
    };
    window.INSIGHT_CONFIG = INSIGHT_CONFIG;
})(window);
</script>

<script src="../../../../js/insight.js"></script>






   
<script async src="//busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js"></script>





   
    
  <!-- <link rel="stylesheet" href="https://unpkg.com/gitalk/dist/gitalk.css"> -->
  <script src="//cdn.jsdelivr.net/npm/gitalk@1.4.0/dist/gitalk.min.js"></script>
  <script src="//cdn.jsdelivr.net/npm/blueimp-md5@2.10.0/js/md5.min.js"></script>
  <script type="text/javascript">
  var gitalk = new Gitalk({
    clientID: '642675de9efee853bde8',
    clientSecret: 'e481d901d83ac31b4041437ec30a4fd00d112cfa',
    repo: 'dbkernel/gitalk-comment',
    owner: 'dbkernel',
    admin: ['dbkernel1989'],
    id: md5(location.pathname),
    distractionFreeMode: true
  })
  gitalk.render('comments')
  </script>

      






    <script defer>
var _hmt = _hmt || [];
(function() {
    var hm = document.createElement("script");
    hm.src = "//hm.baidu.com/hm.js?bf7f972e25b6a36ff4b828ba0214e515";
    var s = document.getElementsByTagName("script")[0];
    s.parentNode.insertBefore(hm, s);
})();
</script>



</body>
</html>